EditCategory.ftl is missing a "screenlet-body"-part showing the summery of an image-upload.

Details

Description

After uploading a product-category-image, you receive the result of the upload-process in a screenlet.
Up to now, the screenlet has a div of the class "screenlet-title-bar", but no "screenlet-body".
To be consitent and to ensure a clear rendering, we should have the result-message in a div of the class "screenlet-body".